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Note: This document contains side effect information about diphenhydramine / ibuprofen. Some of the dosage forms listed on this page may not apply to the brand name Ibuprofen PM.
Applies to diphenhydramine / ibuprofen: oral capsule, oral tablet
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
Applies to diphenhydramine/ibuprofen: oral capsule, oral tablet
The more commonly reported adverse effects include drowsiness and dyspepsia.
Frequency not reported: Hypotension, tachycardia, palpitations
Common (1% to 10%): Peripheral edema
Uncommon (Less than 1%): Elevated blood pressure
The CNS depressant effect of diphenhydramine parallels its plasma concentrations. The plasma concentration threshold for sedation is 30 to 42 ng/mL, and to cause mental impairment is 58 to 74 ng/mL. Dystonic reactions have been accompanied by dizziness, mental confusion, rigidity, lip and tongue protrusion, trismus, torticollis, and swallowing difficulties and generally resolve spontaneously. Delirium has been reported in elderly patients with mild dementia following a small oral dose of diphenhydramine.
The incidence of aseptic meningitis associated with ibuprofen is higher in patients with systemic lupus erythematosus and other connective tissue disease, although it has been reported in patients without such underlying disease states.
Very common (Greater than 10%): Drowsiness, sedation
Frequency not reported: Impaired motor skills, dystonic reactions, delirium
Rare (less than 0.1%): Aseptic meningitis, paresthesias, and pseudotumor cerebri
Frequency not reported: Headache, drowsiness, dizziness
More serious gastrointestinal effects of ibuprofen are uncommon but include occult blood loss, ulcer, gastrointestinal hemorrhage with or without perforation, and pancreatitis. In addition, a case of ibuprofen-associated colitis has been reported.
The incidence of gastrointestinal blood loss with ibuprofen is dose-related, occurring in up to 17% of patients receiving 1,600 mg per day and in 23% of patients receiving 2,400 mg per day.
Patients with a history of serious gastrointestinal events or alcohol abuse are at increased risk for severe gastrointestinal side effect. Ibuprofen should be used with caution in these patients.
Frequency not reported: Nausea, dry mouth
Frequency not reported: Dyspepsia, nausea, diarrhea, abdominal pain, flatulence
Frequency not reported: New or worsened renal insufficiency, nephrotic syndrome with and without renal failure, acute renal failure due to tubulointerstitial nephritis, papillary necrosis, and acute tubular necrosis
Ibuprofen may impair the ability of the kidney to cope with low renal blood flow states due to inhibition of prostaglandin-dependent afferent arteriolar vasodilation. Renal function may be further compromised in patients with heart failure, hypovolemia, cirrhosis, nephrotic syndrome, or hypoalbuminemia. Additional risk factors for ibuprofen-induced renal insufficiency are advanced age and concomitant use of diuretics.
A case-controlled study suggested that patients who consumed 5000 or more pills containing NSAIDs during their lifetime may be at increased risk of end-stage renal disease.
Most commonly, hypersensitivity to diphenhydramine has manifested itself in patients receiving systemic drug after being sensitized to it by topical application. Sensitization with systemic administration has also been reported.
Patients who are at higher risk of hypersensitivity reactions to ibuprofen include those with the syndrome of asthma, nasal polyps, and angioedema and/or bronchospastic reactivity to aspirin. Rare cases of systemic reactions, including interstitial nephritis and diffuse pulmonary infiltrates, have also been reported.
Frequency not reported: Rash, pruritus, eczema, photosensitivity reactions
Frequency not reported: Erythematous or urticarial rashes, pruritus, angioedema, bronchospasm, anaphylactoid reactions
Frequency not reported: Urinary retention, dysuria
Reductions in serum hemoglobin concentrations are uncommon and are usually associated with occult gastrointestinal blood loss. Rare cases of ibuprofen-associated hemolytic anemia, autoimmune thrombocytopenia, and leukopenia have been reported.
Frequency not reported: Hemolytic anemia, thrombocytopenia, agranulocytosis
Frequency not reported: Platelet dysfunction, neutropenia, agranulocytosis, aplastic anemia, hemolytic anemia, thrombocytopenia, eosinophilia, decreases in hemoglobin and hematocrit
Frequency not reported: Blurred vision, diplopia, dry eyes
Rare (less than 1%): Blurred vision
Frequency not reported: Scotomata, diplopia
Frequency not reported: Maculopapular rash, pruritus, vesiculobullous eruptions, erythema multiforme, Stevens-Johnson syndrome, alopecia, toxic epidermal necrolysis, photosensitivity reactions
Elevations in liver function tests three times normal values occur in less than 1% of patients treated with ibuprofen. Ibuprofen-induced hepatitis has been associated with a fatal outcome in some cases.
Very common (over 10%): Elevations in liver function tests (15%)
Frequency not reported: Jaundice, hepatitis
Frequency not reported: Hyponatremia and the Syndrome of Inappropriate Antidiuretic Hormone (SIADH), gynecomastia, hypoglycemia, metabolic acidosis
Frequency not reported: Noncardiogenic pulmonary edema
Acute noncardiogenic pulmonary edema developed on two occasions in an HIV-positive patient. Infectious as well as cardiac etiologies were excluded. A close temporal relationship with the administration of ibuprofen and onset of symptoms was noted.
Frequency not reported: Depression
Common (1% to 10%): Tinnitus
Frequency not reported: Vertigo
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